with a spiral rotor or "aerial screw" based on a water screw, but intended to push against the fluid of the air instead of water. Leonardo labelled it the helix (ἕλιξ, meaning "spiral" in Greek); from ...
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Magnetically driven robotic microscrews offer a new solution for fallopian tube blockagesThe design of the microrobot is another key innovation. It has a screw-shaped body with a helical structure, a cylindrical central tube, and a disk-shaped tail. The helix-shaped structure is ...
has approximately twenty-four nucleotide residues in seven turns of the helix. The helixes have the sense of a right-handed screw. The phosphate groups are closely packed about the axis of the ...
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